KL展开随机场的程序，利用伽辽金法计算，几个类型的相关函数(The program of KL expansion random field is calculated by Galerkin method)

计算随机场的KL展开方法，利用OSE方法计算，(The KL expansion method for computing random fields is calculated by OSE method)

本代码适用于随机场中的KL正交展开，可用于描述参数的空间变异。(This code is suitable for KL orthogonal expansion in random fields and can be used to describe the spatial variation of parameters.)